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Car Forum / Jeep / February 2007good thing to clean out engine
Anyone know of a good chemical to clean out and engine when you change the oil?? besides just new oil....I have a 93 cherokee with 225k on it and wanted to maybe get rid of some sludge build up inside. > Anyone know of a good chemical to clean out and engine when > you change the oil?? besides just new oil....I have a 93 cherokee > with 225k on it and wanted to maybe get rid of some sludge > build up inside. What makes you think there is sludge inside? If there has been any kind of responsible maintenance, there probably isn't. If there is and you try to flush it with chemicals, you are going to loosen all that crud and get it into your oil pump, clog your filter, make the bypass open, and then it goes straight to your bearings. If you're serious about cleaning out the inside of the engine, then you have to remove the oil pan and the valve cover to do it right. Back in 1976 I had a Plymouth Valiant that would only take three quarts on an oil change. I guess you all know the reason. Things have gotten a little better in the lubrication business since then. Earle >> Anyone know of a good chemical to clean out and engine when >> you change the oil?? besides just new oil....I have a 93 cherokee [quoted text clipped - 8 lines] > of the engine, then you have to remove the oil pan and the valve cover to do > it right. [snip] I would worry that clearing out the varnish would loosen up all the oil leaks. -- "We began to realize, as we plowed on with the destruction of New Jersey, that the extent of our American lunatic fringe had been underestimated." Orson Wells on the reaction to the _War Of The Worlds_ broadcast. > Anyone know of a good chemical to clean out and engine when you > change the oil?? besides just new oil....I have a 93 cherokee with > 225k on it and wanted to maybe get rid of some sludge build up inside. Sea Foam from NAPA. Just follow the directions. About once every two years I do the SeaFoam, then use a dealership $17 oil change coupon. Drive another week on that, then drain and refill with synthetic.  SignatureDougW Add a little ATF (1/2 quart) and let it idle for 10 or so minutes. Don't rev the motor during this time. You can also buy 'motor flush' at any auto parts store. Both work well, but don't take the motor above idle while it's got the cleaning solution inside, you will ruin the bearings on an old motor. Carl > Anyone know of a good chemical to clean out and engine when you change the > oil?? besides just new oil....I have a 93 cherokee with 225k on it and > wanted to maybe get rid of some sludge build up inside. Use a good detergent oil and an new oil filter, change the oil as soon as the oil looks slightly dirty. If it is dirty in 100 miles, you know you have a sludge issue. If it is still clean at 1000 miles, the enngine has been taken care of. Takes longer but MUCH easier on an old engine than dumping in any kind of solvent or additive. > Anyone know of a good chemical to clean out and engine when you change the > oil?? besides just new oil....I have a 93 cherokee with 225k on it and > wanted to maybe get rid of some sludge build up inside. When my son-in-law first tried Mobil Clean I was surprised when at 3k the oil was as black as coal. > Use a good detergent oil and an new oil filter, change the oil as soon as > the oil looks slightly dirty. If it is dirty in 100 miles, you know you [quoted text clipped - 5 lines] >> the oil?? besides just new oil....I have a 93 cherokee with 225k on it >> and wanted to maybe get rid of some sludge build up inside. The mark of a good detergent oil. God Bless America, Bill 0|||||||0 mailto:LWHughes3rd@aol.com http://www.billhughes.com/ > When my son-in-law first tried Mobil Clean I was surprised when at 3k the > oil was as black as coal. SignaturePosted via a free Usenet account from http://www.teranews.com Ditto. Just change oil every three thousand miles and contaminates will not begin to make slug to begin with. God Bless America, Bill 0|||||||0 mailto:LWHughes3rd@aol.com http://www.billhughes.com/ > Use a good detergent oil and an new oil filter, change the oil as soon > as the oil looks slightly dirty. If it is dirty in 100 miles, you know [quoted text clipped - 5 lines] > > oil?? besides just new oil....I have a 93 cherokee with 225k on it and > > wanted to maybe get rid of some sludge build up inside. SignaturePosted via a free Usenet account from http://www.teranews.com > Anyone know of a good chemical to clean out and engine when you change the > oil?? besides just new oil....I have a 93 cherokee with 225k on it and > wanted to maybe get rid of some sludge build up inside. I would first open the oil cap and have a close look at it and inside as far as I could see. If the engine has sludge, usually some is under the oil cap. The second place to check, and this will show the slightest amount of sludge buildup, is the CCV tube. I unhook it from the intake and see if I can blow through it into the valve cover. If it still blows clear, there is no sludge. If it is plugged, then some carb cleaner sprayed into the tube with a ream from a wire or air blow to clear it is in order. If this CCV tube plugs with sludge, then oil will start spitting into the air filter. At this point I would think on using a cleaner in the engine. I prefer to use a pint of ATF into the oil about 100 miles before a change. This seems to clean them out without being to harsh on them. Some folks actually remove the valve cover to make sure they get all the sludge out, but I wouldn't do this unless I couldn't keep that CCV tube clear and then I would want to pull the oil pan too. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590 (More Off Road album links at bottom of the view page) This engine has 225k on it and there is no line from the CCV tube to the air box, its gone. >> Anyone know of a good chemical to clean out and engine when you change >> the oil?? besides just new oil....I have a 93 cherokee with 225k on it [quoted text clipped - 26 lines] > Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590 > (More Off Road album links at bottom of the view page) That line is extremely important. It sucks off the engine fumes and condensation from cold starts. Without it the engine will fast fill with sludge and water and up and die very soon. You aren't talking using chemicals to clean sludge here, we are talking putty knife and pressure washer.... Our 88 has 315K on it and I keep that line working. My engine still only uses a liter of oil between changes... Mike > This engine has 225k on it and there is no line from the CCV tube to the air > box, its gone. [quoted text clipped - 29 lines] >> Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590 >> (More Off Road album links at bottom of the view page) I tried getting a piece of hose to connect it to the box, but every size I get is either too big or too small. What size is yours? > That line is extremely important. It sucks off the engine fumes and > condensation from cold starts. [quoted text clipped - 45 lines] >>> Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590 >>> (More Off Road album links at bottom of the view page) > I tried getting a piece of hose to connect it to the box, but every > size I get is either too big or too small. > What size is yours? That sounds like a personal question. *ducks and runs* The hose is a non-standard hard-line in the ZJ. You can either get one from the dealership or use a slightly larger rubber hose and a couple of band clamps. A little electrical tape or duct tape to build up the connector might be required. SignatureDougW Is the line blocked off or have you been sucking raw air into the valve cover? In that case what Mike said won't happen, but you still need to get a line in place. Doug's idea to use tape is a pretty good one. I assume you are talking about the big CCV line to the air cleaner, not the small CCV line to the intake manifold. Earle > I tried getting a piece of hose to connect it to the box, but every size I > get is either too big or too small. [quoted text clipped - 49 lines] > >>> Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590 > >>> (More Off Road album links at bottom of the view page) Nope just no tube there at all > Is the line blocked off or have you been sucking raw air into the valve > cover? In that case what Mike said won't happen, but you still need to [quoted text clipped - 5 lines] > > Earle You're talking about the bigger one though? In that case you're sucking raw air into the intake, for one, and you're sucking raw air into the valve cover if the small line to the intake manifold is still working, for two. This isn't the worst thing that could happen, but it's not real good either. Earle > Nope just no tube there at all > [quoted text clipped - 7 lines] > > > > Earle > You're talking about the bigger one though? In that case you're > sucking raw air into the intake, for one, and you're sucking raw air > into the valve cover if the small line to the intake manifold is > still working, for two. This isn't the worst thing that could happen, > but it's not real good either. IIRC, the small line for the ZJ was about eight bucks at the dealership. SignatureDougW I am talking about both of the tubes, one going to the intake and the other going to the air box, I suppose I just need to take a visit to the local scrapyard and see if I cant find one that is still complete. If I can even find one at all! > You're talking about the bigger one though? In that case you're sucking > raw [quoted text clipped - 4 lines] > > Earle If you can't find one at the junkyard, they're really not that expensive to pick up at an auto parts store. Or, just buy the correct size hose and cut them to the correct size yourself, it's even cheaper that way. This is a '93, correct? I want to say 5/8" should do the trick, although I believe i have a short length of larger hose that acts as a coupling between the elbow and the hose. Just wondering, since you don't have the hoses, do you just have empty holes in the top of your valve cover? Or are the elbows still there, just with no hose attached? > I am talking about both of the tubes, one going to the intake and the other > going to the air box, I suppose I just need to take a visit to the local [quoted text clipped - 9 lines] >> >> Earle What this guy said before, is that standard size hose doesn't fit. The smaller intake hose shouldn't be a problem, but it sounds like the big one is going to need some engineering. Maybe he just didn't try a parts store with a big enough inventory. Earle > If you can't find one at the junkyard, they're really not that expensive > to pick up at an auto parts store. Or, just buy the correct size hose [quoted text clipped - 20 lines] > >> > >> Earle The idiot at autozone sold me 7/8 heater hose and said that should cover it. Yes, I do at least have the elbows still... > Just wondering, since you don't have the hoses, do you just have empty > holes in the top of your valve cover? Or are the elbows still there, just > with no hose attached? Did my post get lost? I gave you a link to the part numbers for new hoses if you want them or do the junk yard crawl. http://jeep.off-road.com/jeep/article/articleDetail.jsp?id=257985 Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590 (More Off Road album links at bottom of the view page) > The idiot at autozone sold me 7/8 heater hose and said that should cover it. > [quoted text clipped - 3 lines] >> holes in the top of your valve cover? Or are the elbows still there, just >> with no hose attached? The problem I had, as I'm sure you do too, is that the elbows will accept a different size hose than the attachments at the throttle body/manifold. I just used a bigger hose to couple with the elbow and used then clamped the other end down tight. I'll take a picture in a little bit to show you exactly how mine is set up. > The idiot at autozone sold me 7/8 heater hose and said that should cover it. > [quoted text clipped - 3 lines] >> holes in the top of your valve cover? Or are the elbows still there, just >> with no hose attached? Ok, some pictures of what I meant: http://s143.photobucket.com/albums/r139/gmergner/Wrangler/?action=view¤t=I MG_0361.jpg I would have gotten a closer shot, but it was dark and I could barely see what I was snapping. > The problem I had, as I'm sure you do too, is that the elbows will > accept a different size hose than the attachments at the throttle [quoted text clipped - 10 lines] >>> empty holes in the top of your valve cover? Or are the elbows still >>> there, just with no hose attached? As Earle mentions, it's the small one that is the really important one, the large one is the intake. Here is a site with the part numbers and prices for the various tubes. They are not too expensive. http://jeep.off-road.com/jeep/article/articleDetail.jsp?id=257985 Mike > I tried getting a piece of hose to connect it to the box, but every size I > get is either too big or too small. [quoted text clipped - 49 lines] >>>> Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590 >>>> (More Off Road album links at bottom of the view page) |
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